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GCN Circulars

GCN Circulars are rapid bulletins submitted by and distributed to the community. See the documentation for help with subscribing to or submitting Circulars.

Search for Circulars by submitter, subject, or body text (e.g. 'Fermi GRB').
To navigate to a specific circular, enter the associated Circular ID (e.g. 'gcn123', 'Circular 123', or '123').
Advanced Search

To narrow the search results, use advanced search syntax. This allows for specifying which circular field to search (submitter, subject, and/or body). For additional information, refer to the advanced search documentation.

Advanced Search Examples (click to copy):

subject:"Swift"
body:"GRB"
submitter:"Judith Racusin"

23610 results found.

  1. GRB060825: MAGIC telescope GeV observation
  2. Konus-Wind observation of GRB 060912
  3. GRB060912: optical observations
  4. GRB 060912B: Watcher observations
  5. GRB060912: OPTIMA-Burst optical observations
  6. GRB 060912B: a long GRB detected with INTEGRAL
  7. GRB 060912, Swift-BAT refined analysis
  8. GRB 060912: Swift detection of a burst with an optical afterglow
  9. GRB 060908: Swift/UVOT Observations
  10. GRB 060908, Swift-BAT refined analysis
  11. GRB 060908 - SDSS Pre-burst Observations
  12. GRB 060908: PROMPT Detection of a Bright Counterpart
  13. GRB 060908: Swift detection of a burst with a bright optical counterpart
  14. GRB 060904A: Suzaku/WAM observation of the prompt emission
  15. GRB060904b optical detections (delayed report due to internet outage)
  16. GRB 060906, Swift-BAT refined spectral analysis
  17. GRB 060906: Swift/XRT Refined Analysis
  18. GRB 060906, Swift-BAT refined analysis
  19. GRB 060906: KAIT observations
  20. GRB 060906: Swift detection of a probable burst
  21. GRB 060904b: SMARTS optical/IR afterglow observations
  22. GRB 060904B: RTT150 optical observations
  23. GRB 060904A: Subaru NIR observation
  24. GRB 060904B: Swift-BAT refined analysis
  25. GRB060904b: Optical observations with Swift/UVOT
  26. Konus-Wind observation of GRB 060904A
  27. GRB 060904A: Refined analysis of the Swift-BAT burst
  28. GRB 060904B: TAROT optical counterpart observations
  29. GRB060904B - SDSS Pre-Burst Observations
  30. GRB 060904: TAROT optical observations
  31. GRB 060904B: Swift detection of a burst with optical counterpart
  32. GRB060904 - SDSS Pre-Burst Observations
  33. GRB 060904: Swift detection of a bright burst
  34. Konus-Wind observation of GRB 060901
  35. GRB 060901: Swift/XRT Refined Analysis
  36. GRB 060901: Swift/XRT Position
  37. GRB 060901: further INTEGRAL results
  38. Two bright bursts from SGR 1806-20 detected with IBAS
  39. GRB 060605, observations using an Integral Field Unit
  40. GRB 060814: Suzaku/WAM observation of the prompt emission
  41. Swift-BAT trigger 226614 is not a GRB
  42. GRB060826 - SDSS Pre-Burst Observations
  43. GRB 060826(?): Swift detection of a possible burst
  44. GRB 060825: Swift-BAT Refined Analysis
  45. GRB 060813: Swift/BAT, Konus-Wind, and Suzaku/WAM joint prompt spectral analysis
  46. GRB060825: Liverpool Telescope optical observations
  47. GRB 060825: TNG optical observations
  48. GRB 060825: TAROT optical observations
  49. GRB 060825: P60 Observations
  50. GRB060825: BOOTES-IR optical observations
  51. GRB 060825: Swift detection of a burst
  52. GRB060814: Break in the XRT light curve
  53. GRB 060813: A long, bright GRB detected with Suzaku WAM
  54. Konus-Wind observation of GRB 060814
  55. GRB 060814: Refined analysis of the Swift-BAT burst
  56. GRB060805B: optical observations
  57. GRB 060814 - SDSS Pre-Burst Observations
  58. GRB 060814: TAROT optical observations
  59. GRB 060814: Swift detection of a bright burst
  60. Konus-Wind observation of GRB 060813
  61. GRB 060813: Refined analysis of the Swift-BAT burst
  62. GRB 060813: Swift detection of a burst
  63. GRB051109B: Late-time Radio Observations
  64. A dust-scattering halo detected around SGR 1806-20
  65. Swift detection of an outburst from the 4U 1246-58 LMXB burster
  66. GRB060807: Possible Highly Significant X-ray Emission Lines
  67. GRB060714: optical observations
  68. IBAS Alert n. 3422: not a GRB
  69. GRB060717: optical observations
  70. GRB 060805B: XRT Team Analysis
  71. GRB060806 is similar to previous activity of SGR1806-20
  72. GRB 060807: UVOT Upper limits
  73. GRB 060807: Refined analysis of the Swift-BAT burst
  74. GRB060806 = SGR1806-20
  75. GRB 060805B: RHESSI Spectral Fit
  76. GRB060807: optical upper limit in white light
  77. IPN triangulation of GRB060806 (long, exceptionally bright)
  78. GRB060807 - SDSS Pre-burst Observations
  79. GRB 060805B: Swift/UVOT Upper Limits
  80. GRB 060807: Kanazawa R-band observation
  81. GRB 060807: Swift detection of a burst
  82. GRB 060801: Second Epoch WSRT Radio Observations
  83. IPN triangulation of GRB060805B
  84. GRB 060805: optical upper limit in R
  85. GRB 060805: Swift-BAT Refined Analysis
  86. GRB 060805: Swift/UVOT Upper Limits
  87. GRB 060805: KAIT observations
  88. GRB 060805 - SDSS Pre-Burst Observations
  89. GRB 060805: Swift detection of a burst
  90. GRB 060804: Swift UVOT observations
  91. GRB 060804: Swift-XRT Team Refined Analysis
  92. GRB 060804: Refined analysis of the Swift-BAT burst
  93. GRB 060804: Swift detection of a burst with a possible UVOT counterpart
  94. GRB060801: Radio Observations
  95. GRB 060801: optical observations at Hanle and Calar Alto
  96. GRB060801: optical upper limit in R
  97. GRB 060801: Swift XRT refined analysis
  98. GRB 060801: Refined analysis of the Swift-BAT short hard burst
  99. GRB 060801: Swift detection of a short burst
  100. IBAS Alert n. 3415: not a GRB

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